Mitsubishi Aluminum Kabushiki Kaisha

Mitsubishi Aluminum Company, Ltd.

Mitsubishi Aluminium Kabushiki Kaisha

Yo Takeuchi

Ken Toma

Masami Asano

Hajime Kudo

Hideo Watanabe

Kazuo Yamada

Katashi Katsumata

Reijiro Maruyama

Yasuo Kobayashi

Yoshinobu Okada

Hiromi Goto

Koichi Ohori

Hideaki Kakita

Michihiro Yoda

Tetsuji Iwama

Shoji Takeuchi

Noriaki Takahashi

Masanao Iida

Masahiro Tsuchiya

A method of producing a heat exchanger comprising abutting a tube made of an aluminum material and fins made of an aluminum material, applying to the resulting abutments a flux containing zinc halide, and thereafter conducting a reaction soldering in an inert gas atmosphere. The assembled tube and fins applied with the flux may be moved in a position to enhance the formation of zinc deposited by the reaction soldering during the drying step of the flux. The heat exchanger produced by this method has a thick and uniform Zn coating at the joints with good mechanical strength and surface conditions.

Heat exchanger and method of producing same

A brazed aluminum article comprising at least two aluminum members brazed together with a filler metal, which consists essentially of:

Brazed aluminum article

A method of producing a heat exchanger comprising abutting a tube made of an aluminum material and fins made of an aluminum material, applying to the resulting abutments a flux containing zinc halide, and thereafter conducting a reaction soldering in an inert gas atmosphere. The assembled tube and fins applied with the flux may be moved into a position to enhance the formation if zinc deposited by the reaction soldering during the drying step of the flux. The heat exchanger produced by this method has a thick and uniform Zn coating at the joints with good mechanical strength and surface conditions.

Method of brazing a heat exchanger using a reaction flux

An aluminum alloy sheet as a fin material for tubes of a heat exchanger, excellent in high-temperature sagging resistance and sacrificial anode property and having a high room-temperature strength, which consists essentially of:

Aluminum alloy sheet excellent in high-temperature sagging resistance

A substrate for a magnetic disc prepared from an aluminum alloy which consists essentially of from 3.0 to 5.0 percent, preferably from 3.5 to 4.5 percent, Mg, from 0.5 to 3.0 percent, preferably from 0.5 to 1.7 percent, Zn, and the balance Al and inevitable impurities. The inevitable impurities contain not more than 0.10 percent Si, not more than 0.10 percent Fe, not more than 0.01 percent, Mn, not more than 0.01 percent Cr, not more than 0.01 percent Ni, and not more than 0.01 percent Ti. The aluminum alloy substrate may also contain from 0.3 to 2.0 percent, preferably from 0.5 to 1.0 percent, Cu, and/or from 0.02 to 0.5 percent, preferably from 0.05 to 0.2 percent, Zr. The aluminum alloy substrate for a magnetic disc has a structure wherein fine and uniform intermetallic compounds are present in the matrix metal, with almost no non-metallic inclusions present therein, and which has high hardness and high strength, thereby making it possible to provide a magnetic disc (1) having improved surface smoothness and (2) of reduced thickness. The disc substrate can be coated to provide high density magnetic recording.

Method of using aluminum alloy as substrate for magnetic discs with

A method for manufacturing a novel heat exchanging vehicle comprising the steps of forming an inorganic surface layer over a cold rolled, aluminum or aluminum alloy sheet; treating the inorganic surface layer with a phosphoric compound solution; annealing the sheet; and forming the sheet into a predetermined shape. The resulting heat exchanging vehicle such as a fin has a good wettability and a high corrosion resistance to white rust based on the uniformity of the said surface layer.

Method for manufacturing heat exchange vehicle

A method of manufacturing an aluminum alloy sheet excellent in hot formability. A hot rolled plate of an aluminum alloy is cold rolled into a cold rolled sheet with a reduction ratio of at least 20%. The cold rolled sheet thus obtained is subjected to intermediate heat treatment wherein it is heated to a temperature of 420.degree. to 560.degree. C., at a heating rate of at least 2.degree. C. per second while it is heated from 150.degree. to 350.degree. C., and the sheet is then cooled to room temperature, at a cooling rate of at least 1.degree. C. per second while it is cooled from 420.degree. to 150.degree. C. The resulting heat treated sheet is subjected to final cold rolling with a reduction ratio of 15 to 60%.

Method of manufacturing aluminum alloy sheets excellent in hot

This invention relates to a superplastic aluminum alloy comprising Mg, Cu, and at least one of Mn, Cr and Zr. The alloy has an elongation substantially of from 330% to 800% and can be readily produced.

Superplastic aluminum alloy

A clad sheet comprising an aluminum alloy sheet having excellent high-temperature sagging resistance and thermal conductivity comprising an aluminum alloy sheet clad on at least one surface with a brazing metal, said aluminum alloy sheet consists essentially of:

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Susono, Japan

Yo Takeuchi